But I never knew this. " Yep. Now come up here and let me teach you how to use this circular saw."

但我从来不知道这些。“是的。现在上来，让我何使用这个圆。”

Do me a favor and help me cut this two-by-four, will ya? Pass me the circular saw, and grab hold of the end of the board.

帮我一下忙吧，把这个截宽四寸厚二尺的，可以吗？给我一下那个圆，抓住这块木头的那端。

Not to speak of the great circular saw that had to be set in its course to the nicety of a pencil line, never swaying east nor west, lest it should fly asunder.

更不用说巨大的圆了，它必须在其路线上精确设置为铅笔线，从不向东或向西摇摆，以免它飞散。